Mr. Tonami (right) is the principal of Rei and Akira's school. He attended school with Yuji and Okumiya. He frequently challenged Yuji to fights because he could never defeat him. Mr. Tonami still harbors resentment towards Yuji. There are hints that he might be in denial about his feelings for Yuji. Tamaki is his nephew, the son of his sister. It is also suggested that he cannot disobey his sister.
Source:
Our Kingdom manga










